WEBVTT 00:00.000 --> 00:15.000 This is Haka Public Radio Episode 35344 Thursday the 17th of February 2022, today's show is entitled, 00:15.000 --> 00:16.000 Vernier Caliper. 00:16.000 --> 00:21.000 It is hosted by Ken Falon, and is about 9 minutes long, and carries a clean flag. 00:21.000 --> 00:41.000 First time I read this, can recommend this menu useful tool for measuring stuff. 00:41.000 --> 00:47.000 Hi everybody, my name is Ken Falon, and you're listening to another episode of Haka Public Radio. 00:47.000 --> 00:52.000 Today is a show that I wanted to do for some time, but I was prompted to do it for two reasons, 00:52.000 --> 00:57.000 one that were short of shows, and I wanted to get this message out to you. 00:57.000 --> 01:01.000 So if you haven't submitted a show this year, please consider doing that immediately. 01:01.000 --> 01:07.000 If you have never submitted a show, then please consider introducing yourself to the community. 01:07.000 --> 01:15.000 Okay, the reason I'm bringing this up now, the other reason that I'm bringing this up now, is that I was on a video call yesterday, 01:15.000 --> 01:23.000 and somebody noticed this in the background, and I realized I had wanted to do a show about this for a long time, 01:23.000 --> 01:28.000 and it is the Vernier Caliper's, what's a Vernier Caliper's you ask? 01:28.000 --> 01:33.000 Well, it's actually a tool used for measuring stuff, that's along on the short of it. 01:33.000 --> 01:42.000 I came across this for the first time in my first year of engineering, and if you don't have one, it's very, very useful thing to have. 01:42.000 --> 01:45.000 Let me just describe it for you, it composes of two parts. 01:45.000 --> 01:51.000 The first part is a piece of metal in the shape of a T. 01:51.000 --> 01:59.000 There's a long edge on the left hand side at the top of the T with a chamfer to a point, 01:59.000 --> 02:03.000 and there's a short edge on the right hand side with a chamfer to a point. 02:03.000 --> 02:07.000 Or you could say on the bottom there's a long edge on the top there's a long edge. 02:07.000 --> 02:17.000 The answer is inside of that sliding up and down the long base, about 30 cm or a foot, no actually it's 15 cm or a foot. 02:17.000 --> 02:27.000 Half a foot, then there is a slider, and my one, the slider has zero to nine, zero to ten actually, 02:27.000 --> 02:34.000 and zero to 25 of zero point, zero to one inches, so the top is Imperial and the bottom is metric. 02:34.000 --> 02:40.000 You can get various different ones, you can even get digital ones or ones with a dial on them, but I have like an ultimate GP. 02:40.000 --> 02:49.000 So what this thing does is it allows you to measure various different, various different dimensions of a component, 02:49.000 --> 02:57.000 and I've seen people use the scrappy bit for that when you get a dimension, so you set this as accurately as one centimeter, 02:57.000 --> 03:06.000 and then you can scrape off a line of mark. I was always found upon that you shouldn't do that, but it seems to be a fairly standard thing. 03:06.000 --> 03:14.000 And this thing I picked up for less than a tenor, and you can get cheaper ones metoplastic that actually work out, that seemed to be quite well. 03:14.000 --> 03:25.000 Good result. So when you open it out, not only does the slider slide along the measurement unit, but a metal pin sticks out at the bottom. 03:25.000 --> 03:33.000 And the reason for that is you can get three different types of dimensions, so if we go through the Wikipedia article, which I recommend you reading, 03:33.000 --> 03:39.000 we have the first part is the outside jaws, and these are used to measure external damages of an object, 03:39.000 --> 03:45.000 like for example the outside of a cylinder, or the width of an object like a rod or something like that. 03:45.000 --> 03:51.000 Or if you just wanted to say, well, I want to have three such measures there, a market, and then you can scrape your mark along. 03:51.000 --> 03:59.000 Then we have the inside jaws, where it goes inside the object itself, and you can measure the internal diameter. 03:59.000 --> 04:06.000 So you would use the outside one to measure maybe the outside of a pipe, and you would use these inside ones to measure the inside of a pipe. 04:06.000 --> 04:08.000 Very, very useful thing. 04:08.000 --> 04:22.000 And then the depth probe or rod is used to measure the depth of an object, so if there was a pipe, for instance, you could drop that inside the pipe, 04:22.000 --> 04:30.000 rest it on the top, and the rod will go down to the ground, for example, and you will be able to measure that there. 04:30.000 --> 04:34.000 And mine has also a little screw at the top that you can use for locking. 04:34.000 --> 04:42.000 I got, I have a digital one that was more expensive, but invariably runs out of batteries whenever I want to use it. 04:42.000 --> 04:53.000 And this one I got real cheap, and it's up in the back, it's got a sticker with the conversion from millimeters to widthward and various different types of thread. 04:53.000 --> 05:01.000 But so basically if you just use it as a regular old bug standard rule, you know, if you do a woodworker something like that, it's just absolutely fine. 05:01.000 --> 05:12.000 If you do the timing me a little bit of metalworker something, you want to take a screw and or a nail or something and find out, well, is what is the exact dimension. 05:12.000 --> 05:29.000 There's a really cool aspect of this that you can do, and that is, you can get accuracy's to point one of a millimeter or the equivalent in material. 05:29.000 --> 05:41.000 And how you do that is, as you grasp something on the gel, so I'm just going to pick up here and I've got the graphs on the outer gels and I see a pencil. 05:41.000 --> 05:44.000 It is a big viral. 05:44.000 --> 05:56.000 So, I'm grasping that in the outer gels, and I see that the zero on the scale, so it lines up with the one, two, three. 05:56.000 --> 06:05.000 So sorry, it is five centimeters, six centimeters, seven centimeters, so it's more than seven centimeters, but less than eight centimeters. 06:05.000 --> 06:13.000 So we know it's seven points something. Now, we can tell that's because that's where the first zero on the sliding scale is. 06:13.000 --> 06:20.000 But the first, the sliding scale doesn't line up with the scale on the perennial calipers itself. 06:20.000 --> 06:38.000 No, it doesn't, it's offset slightly, so that as you look along that line and you see where the markings line up with the numbers on the sliding scale, you will see that you can get your second point measurement. 06:38.000 --> 06:51.000 So I've already said this is five, six, seven points, something, and I look along and I see that the one on the sliding scale kind of is somewhere between the 12 and the 13. 06:51.000 --> 06:57.000 Now that's not what I'm looking for. The two is getting very close to 15, six, 70. 06:57.000 --> 07:03.000 The three is not quite over the 22, and the 22 doesn't matter. 07:03.000 --> 07:14.000 All you're doing is you're looking to see where the bottom line marks up with any of the center major lines, and I see that five marks up with one of the center major lines perfectly. 07:14.000 --> 07:25.000 So I can say with relative degree of confidence that this is seven point five is the dimension outside dimension of this. 07:25.000 --> 07:37.000 And it's knuckle, that's close enough for jazz, close enough for basically close enough for jazz. It's a really, really useful tool to have. You would be amazed at how often you would use it. 07:37.000 --> 07:47.000 For example, I want quickly measure a piece of prospects over here, I measure it, and I see that it is more or less for. 07:47.000 --> 07:57.000 Even then having a sliding one with imperial numbers is quite useful as well, because you can see if the thread that you're working on. 07:57.000 --> 08:13.000 If it's not really fitting nicely into a metric system, which is used commonly over here, then you can see that, oh, this could be an imperial thread, and there's a standard imperial or a widthward thread that I can use. 08:13.000 --> 08:23.000 So, very, very useful. I highly recommend if you do anything around the house, even, you know, it's a very useful thing to do. 08:23.000 --> 08:40.000 I was the other day measuring up, I needed a little plastic strip for a window, and it was just handy to be able to get in there with the inside jaws and in the gap and measure how much of a gap is there in real terms. 08:40.000 --> 08:56.000 So, that was my tip for earlier calipers. If you don't have one, have a look. See if you can get one, you can get the plastic ones, which are, I don't know if they're kind of plastic or the carbon fiber reinforced something. 08:56.000 --> 09:14.000 But, this seemed to be also under five dollars, something like that I've seen. I've seen a big cloud do a breakdown on them, and they seemed to be reading off the scale, so that a new positionally where it was on the thing. 09:14.000 --> 09:20.000 So, that's this tune in tomorrow for another exciting episode of Hacker Public Radio. 09:20.000 --> 09:28.000 You've been listening to Hacker Public Radio at HackerPublicRadio.org. 09:28.000 --> 09:40.000 Today's show was contributed by an HBR listener like yourself. If you ever thought of recording a podcast, then click on our contribute link to find out how easy it really is. 09:40.000 --> 10:00.000 For HBR, this kindly provided by an honesthost.com. The internet archive and our Sync.net, on Meso otherwise status, today's show is released under a creative comments, attribution, share-alike, videos or lessons.